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Finding the Fourth Proportional to 169,321.50, 253,949.72 and 85,059.09

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Solution

The fourth proportional to 169,321.50, 253,949.72 and 85,059.09 is: 127,572.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,321.50 : 253,949.72 = 85,059.09 : x
  2. Step 2: Convert to fraction form
    169,321.50/253,949.72 = 85,059.09/x
  3. Step 3: Cross multiply
    169,321.50x = 253,949.72 × 85,059.09
  4. Step 4: Simplify right side
    169,321.50x = 21,600,731,663.66
  5. Step 5: Solve for x
    x = 21,600,731,663.66/169,321.50
  6. Step 6: Final answer
    x = 127,572.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.